Constant current control circuit suitable for power supply parallel connection

• Main Authors: GUO WENJUN, HUA MING, TANG DENGPING, JIANG FAN, GU WENMING
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONTROLLING; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

The invention provides a constant current control circuit suitable for power supply parallel connection, which solves the problem that the system safety is harmed because the constant current value of the output current of a traditional redundant backup power supply system is far greater than the rated demand current value of a load, and realizes that the total constant current output by the redundant backup power supply system is the constant current limit value of the system. And the sum of the constant current values of each power supply is not required. When one power supply breaks down and quits the parallel connection state, the constant current point of the power supply still in the working state can be automatically changed, the load current requirement is guaranteed, and the reliability of the system is improved. 本发明提供了一种适用于电源并联的恒流控制电路，解决了传统冗余备份电源系统输出电流恒流值远超负载额定需求电流值从而危害系统安全的问题，实现了冗余备份电源系统输出恒流总电流为系统恒流限制值，而非每台电源恒流值总和。当有一台电源故障退出并联状态时仍处于工作状态电源的恒流点会自动变更，保证负载电流需求，提高系统的可靠性。